Airplane



March 3, 1931. A. c. GlENG ER AIRPLANE Filed Sept. 1'4. 1929 INVENTOR.

ATTORNEYS.

UNITED ALBERT "onAnLns GIENGER," or cAscAnr. sUM MI'r onneoiv f 1 I AIRPLANE l I V Application-filed September 14, 1929.} Seria1 No..392, 68'0.

Myinvention relates'to improvements in" airplanes, and it consists in the combinations, constructions and arrangements herelnafter described and claimed.

5 An object of my invention is to provide an 1 airplane that employs one or morecylindrical members for aiding in lifting and guiding the airplane. Imount the power plant and the propellers within the cylindrical members.

A further object of my invention is to provide means for aiding in guiding the airplane. This means consists of a flat member centrally disposed with respect to the cylinder and extendingrearwardly to the airplane elevai tor. The air stream flowing through the cylinder is divided by the flat member, and these 'twostreams striking the membertend to hold the airplane on an even keel.

In the drawings I have shown twocylin- 3a ders, although the number may be changed at will. V

Other objects and advantages willappear asthe specification proceeds, and the novel features will be particularly pointed outin the claims hereto annexed.

My invention is illustrated in theaccom-' panying drawing, in which I Figure 1 is a top plan view of the device, Figure 2vis a front elevation, and

I Figure 8 is a section through one of the cylinders. v I

. In carrying out my invention, I providea fuselage 1 of the'shape shown in Figure 1, and

' on either side I mount a cylinder 2. In Figure 1 I have shownthese cylinders as having a length corresponding to the distance between the leading edge 3 and the trailing edge 4 of a lifting wing 5. The length of thecylin der may be changed to suit the design of the craft. o v I Referring t'oFigure 3, it will be noted that I mount an engine 6 within the cylinder 2.

This engine is carried by braces 7 that extend to the wall of the cylinder. A shaft 8 projects forwardly and rearwardly of the engine and carries a front propeller 9 and a rear therear propeller may be disposed anywhere in back of the engine. Both propellers are driven by the same engine.

Itwill be noted from Figure lthat planes 11 extend rearwardly from the backs of'the cylinder 2. Figure?) shows how-each ,55'

plane 11 is centered with respect to the cylinder; The planes terminate at the rear elevators 12. I Figure3 shows abar-like tail skid 13'as extending from the cylinder 2 t0 therear of theplane 11-. 5

From the foregoing description of the'various parts of the device, the operation thereof Y may be readily understood.

The airplane is flown in the and it is more readily kept on an even-keel because theplanes 11 are centrally disposed I with respect to the cylinders 2 and extend re'arwardly therefrom. The propellers 9 and 10 drive the air through the cylinders, and this air flows above and below the planes 11. f The flowing of this air above and below the planes has a greater stabilizing effect than if the planes were not provided. The planes also have an added lifting effect. H Although I have shown and described one embodiment of my invention, it is to be under stood that the same issusceptible of various changes, and I reserve the right to employ such changes as may come within the scope of the invention as claimed.

I I clann: 7

1. An airplane construction comprising a fuselage including a rudder and an elevator arranged at the trailing end thereof, a tubular member disposed on each side of the fuselage, an engine mounted in each tubular member, propellers disposed within said tubular members and actuated by their respective engines, and flat planes extending rearwardly usual manner,

from the ends of the tubular members and be 1 ing disposed midway between the tops and bottoms'thereof and terminatingin the elevator on thefuselage.

2. An airplane construction comprising a fuselage having an elevator and a rudder associated therewith, a tubular member disposed on each side of the fuselage, the axes of the tubular members and the fuselage being disposed in the same horizontal plane, means for forcing air through the tubular members, and'fiat planes extending rearwardly from the ends of thetubular members positioned midway between the tops and bottoms of the tubular members.

ALBERT CHARLES IENGER; 

